Derivative works — US Patent 12015376

Defensive Disclosure Document

Title: Advanced Electrical Harnessing Systems and Methods for Power Distribution

Publication Date: May 13, 2026

Abstract: This document discloses a series of technical variations and alternative embodiments for electrical lead assemblies used in power distribution, particularly those involving the interconnection of branch circuits to a main feeder or trunk cable. The disclosures herein are intended to enter the public domain and serve as prior art for future patent applications. The disclosed variations explore alternative materials, extreme operational parameters, cross-domain applications, integration with modern digital technologies, and novel failure modes, building upon the foundational concepts of overmolded cable joints.

Part 1: Variations on Dual Drop-Line Lead Assemblies

(Derivative concepts based on the architecture of claim 1 of US 12,015,376)

1.1. Material & Component Substitution

Derivative 1.1.1: Gallium Nitride (GaN) Semiconductor-Based Junction

Enabling Description: The electrical interconnection region is not a passive metal lug. Instead, it incorporates a Gallium Nitride (GaN) Field-Effect Transistor (FET) switching module embedded within the undermold. The feeder cable is interrupted, with its ends connected to the drain and source of the GaN FET. The two drop lines are connected to the gate via a small control circuit, also embedded. This allows for active current management directly at the junction. The overmold is a thermally conductive polymer, such as a boron nitride-filled epoxy, which acts as a heat sink. This configuration enables high-frequency switching to isolate or modulate power from the connected solar arrays in response to grid fluctuations or fault conditions, a function traditionally handled by a centralized inverter or combiner box. The system can perform Maximum Power Point Tracking (MPPT) on a per-junction basis.

Mermaid Diagram:

graph TD
    subgraph Overmold [Thermally Conductive Overmold]
        subgraph Undermold [High-Dielectric Undermold]
            Feeder_In[Feeder Cable In] -->|Drain| GaN_FET[GaN FET Module];
            GaN_FET -->|Source| Feeder_Out[Feeder Cable Out];
            Drop1[Drop Line 1] --> Control[Control Circuit];
            Drop2[Drop Line 2] --> Control;
            Control -->|Gate| GaN_FET;
        end
    end
    style GaN_FET fill:#f9f,stroke:#333,stroke-width:2px
    style Control fill:#ccf,stroke:#333,stroke-width:2px

Derivative 1.1.2: Shape-Memory Alloy (SMA) Compression Connector

Enabling Description: The compression lug (20) is replaced with a component made from a Nickel-Titanium (Nitinol) shape-memory alloy. During assembly, the stripped portions of the feeder cable and drop lines are inserted into the SMA lug, which is in its expanded, martensitic state. The assembly is then heated, causing the SMA to transition to its austenitic state and contract with immense force, creating a permanent, gas-tight, and vibration-resistant electrical connection. This eliminates the need for a hydraulic crimping tool on the manufacturing line, simplifying production. The overmold material is a high-temperature thermoplastic, such as PEEK (Polyether ether ketone), to withstand the heat required for the SMA phase change.

Mermaid Diagram:

sequenceDiagram
    participant A as Assembly Line
    participant SMA as SMA Lug (Martensite)
    participant Wires as Feeder/Drop Wires
    participant H as Heating Element
    participant M as Molding Machine

    A->>Wires: Insert wires into SMA lug
    activate SMA
    Wires->>SMA: Wires seated
    A->>H: Activate Heater
    H->>SMA: Apply Heat (T > A_f)
    SMA->>SMA: Phase Change to Austenite
    SMA-->>Wires: Exerts High Compressive Force
    deactivate SMA
    A->>M: Transfer Assembly
    M->>SMA: Apply Undermold/Overmold

1.2. Operational Parameter Expansion

Derivative 1.2.1: Cryogenic Superconducting Lead Assembly

Enabling Description: The feeder cable and drop lines are fabricated from a high-temperature superconductor (HTS), such as Yttrium Barium Copper Oxide (YBCO), formed as a tape conductor. The entire lead assembly is designed to operate in a liquid nitrogen (LN2) environment at 77K. The insulation (16) is a multi-layer composite of polyimide film and glass fiber for thermal and electrical insulation. The overmold and undermold structures are made from a cryogenic-grade, glass-reinforced epoxy composite (e.g., G-10 CR) that maintains structural integrity and sealing properties at extremely low temperatures. The compression lug is made from a copper-beryllium alloy (C17200) to maintain clamping force and high conductivity at 77K. This assembly is designed for high-power density applications, such as power distribution within magnetic resonance imaging (MRI) machines or particle accelerators, where minimizing resistive losses is paramount.

Mermaid Diagram:

graph TD
    A[YBCO Feeder Cable In] --> B{Cryo-Grade Overmolded Joint};
    B --> C[YBCO Feeder Cable Out];
    D[YBCO Drop Line 1] --> B;
    E[YBCO Drop Line 2] --> B;
    subgraph B
        direction LR
        Lug[BeCu Compression Lug]
        Under[G-10 CR Undermold]
        Over[G-10 CR Overmold]
    end
    F[LN2 Cryogenic Bath] -.-> B;
    style F fill:#cff,stroke:#333,stroke-width:2px

Derivative 1.2.2: Deep-Sea High-Pressure Lead Assembly

Enabling Description: This assembly is designed for subsea power distribution at depths up to 4000 meters (>40 MPa pressure). The feeder cable is a pressure-balanced, oil-filled conduit. The electrical interconnection at the nexus (19) is performed within a one-atmosphere, pressure-resistant housing made of titanium (Grade 5, Ti-6Al-4V). The drop lines penetrate this housing via glass-to-metal seals. After the electrical connection is made using a terminal block, the housing is filled with a high-dielectric, non-compressible silicone gel (e.g., Dow Corning Sylgard 527) and sealed. The "overmold" is this titanium housing itself, which provides environmental protection against saltwater ingress and extreme pressure. This is applicable for connecting subsea sensors, remotely operated vehicles (ROVs), or seafloor nodes to a main power and data umbilical.

Mermaid Diagram:

classDiagram
  class TitaniumHousing {
    +pressureRating: 40 MPa
    +material: Ti-6Al-4V
    +internalVolume: sealed
  }
  class FeederCable {
    +isPressureBalanced: true
  }
  class DropLine {
  }
  class GlassToMetalSeal {
    +hermetic: true
  }
  class SiliconeGel {
    +dielectricStrength: 20 kV/mm
    +isNonCompressible: true
  }
  TitaniumHousing "1" -- "2" GlassToMetalSeal : contains
  GlassToMetalSeal "1" -- "1" DropLine : passes
  TitaniumHousing "1" -- "1" SiliconeGel : filled with
  TitaniumHousing "1" -- "1" FeederCable : connects to

1.3. Cross-Domain Application

Derivative 1.3.1: Aerospace - Smart Fuselage Wiring Harness

Enabling Description: The "feeder cable" is a main power bus running the length of an aircraft fuselage. The "drop lines" are smaller gauge wires tapping off the main bus to power various avionics, lighting, and sensor modules. The overmolded joint is made from a lightweight, flame-retardant aerospace polymer (e.g., Ultem/PEI) and is designed to be a "smart node." Inside the overmold, alongside the electrical connection, is a small microcontroller and a CAN bus transceiver. This allows each junction to report its status (current draw, temperature) back to a central vehicle health management system, enabling predictive maintenance and rapid fault location. The dual-drop design allows a single node to power redundant systems extending fore and aft from the tap point.

Mermaid Diagram:

graph LR
    subgraph SmartJunction_Overmold [Ultem Overmold]
        PowerBus[Fuselage Power Bus] --o J{Junction}
        J --o PowerBus
        Drop_Fwd[Avionics Drop Line Fwd] --> J
        Drop_Aft[Avionics Drop Line Aft] --> J
        J -- contains --- M[Microcontroller]
        J -- contains --- T[CAN Transceiver]
        T --> CAN[CAN Bus]
    end
    CAN --> VHMS[Vehicle Health Mgmt System]

Derivative 1.3.2: AgTech - Modular Irrigation & Sensor Grid

Enabling Description: The feeder cable is a heavy-duty, direct-burial cable providing power and data along a crop row. The overmolded joints are spaced at intervals corresponding to plant spacing. Each dual-drop joint serves two adjacent smart irrigation/sensor units. Drop line 1 powers and controls a drip emitter and soil moisture sensor to its left, while drop line 2 does the same for a unit to its right. The connection is a hybrid, carrying both 24V DC power and a digital control signal (e.g., Modbus over RS-485). The overmold is a UV-stabilized, chemically resistant polypropylene, designed to withstand fertilizers, pesticides, and direct sun exposure. This creates a "plug-and-play" field infrastructure that dramatically reduces installation time compared to traditional point-to-point wiring of individual sensors and valves.

Mermaid Diagram:

erDiagram
    FEEDER_CABLE ||--o{ JOINT : has
    JOINT {
        string ID
        string Location
    }
    JOINT ||--|{ DROP_LINE : branches
    DROP_LINE {
        string Direction "left or right"
    }
    DROP_LINE ||--|| SENSOR_UNIT : powers
    SENSOR_UNIT {
        string Type "Moisture, pH, etc."
        string ValveState "Open/Closed"
    }

Derivative 1.3.3: Medical - Implantable Neuromodulation Lead Array

Enabling Description: The feeder cable is a biocompatible, multi-conductor lead body designed for implantation, connecting to an implanted pulse generator (IPG). The overmolded joints are micro-scale T-junctions, made from medical-grade silicone or polyurethane. From each joint, two micro-electrode drop lines branch off in opposite directions to stimulate different nerve pathways or muscle groups. The electrical connection is made with laser-welded platinum-iridium wires. The overmolding process is a low-temperature injection molding to avoid damaging the delicate wires and surrounding tissue. This architecture allows for the creation of a dense, distributed stimulation field from a single implantable lead, targeting, for example, multiple points along the spinal cord for pain management or different fascicles within a peripheral nerve.

Mermaid Diagram:

graph TD
    IPG[Implanted Pulse Generator] --> Feeder[Main Lead Body];
    Feeder --> Joint1(Micro-molded Joint);
    Feeder --> Joint2(Micro-molded Joint);
    Joint1 --> Electrode1A[Electrode 1A];
    Joint1 --> Electrode1B[Electrode 1B];
    Joint2 --> Electrode2A[Electrode 2A];
    Joint2 --> Electrode2B[Electrode 2B];

    subgraph SpinalCord [Target Tissue]
        direction LR
        Nerve1[Nerve Pathway 1]
        Nerve2[Nerve Pathway 2]
        Nerve3[Nerve Pathway 3]
        Nerve4[Nerve Pathway 4]
    end
    Electrode1A --> Nerve1
    Electrode1B --> Nerve2
    Electrode2A --> Nerve3
    Electrode2B --> Nerve4

Part 2: Variations on Single Drop-Line Lead Assemblies

(Derivative concepts based on the architecture of claim 14 of US 12,015,376)

2.1. Integration with Emerging Tech

Derivative 2.1.1: IoT-Enabled Predictive Maintenance Joint

Enabling Description: The single-drop overmolded joint contains an embedded sensor suite and a low-power wireless transmitter (e.g., LoRaWAN or NB-IoT). The sensors include a non-contact Hall effect sensor for current monitoring on the drop line, a thermistor to measure the junction temperature, and a MEMS accelerometer to detect vibration. The device is powered parasitically from the feeder cable. The sensor data is transmitted periodically to a cloud platform. An AI model on the cloud analyzes trends in current, temperature, and vibration to predict failures such as connector degradation, insulation breakdown, or physical damage to the cable. If an anomaly is detected, a maintenance alert with the specific GPS-tagged location of the joint is issued.

Mermaid Diagram:

sequenceDiagram
    participant Joint as IoT Joint
    participant Cloud as AI/Analytics Platform
    participant Tech as Field Technician

    loop Every 5 minutes
        Joint->>Joint: Read Current, Temp, Vibration
        Joint->>Cloud: Transmit Sensor Data (LoRaWAN)
    end

    Cloud->>Cloud: Analyze data for anomalies
    alt Anomaly Detected
        Cloud->>Tech: PUSH Notification: "Alert at Joint #123 (GPS coords)"
        Tech->>Joint: Navigate to location for inspection
    else No Anomaly
        Cloud->>Cloud: Archive data
    end

Derivative 2.1.2: Blockchain-Verified Component & Power Ledger

Enabling Description: The overmolded joint includes a secure crypto-microcontroller (e.g., an ATECC608A). During manufacturing, the component's unique serial number, materials bill, and QA test results are hashed and stored on a permissioned blockchain, creating an immutable "digital passport" for the joint. In operation, the embedded microcontroller measures the kilowatt-hours flowing through the drop line from the solar array. It periodically signs this energy production data with its private key and records it on the same blockchain. This creates a trusted, auditable ledger of power generation, useful for verifying Renewable Energy Credits (RECs) or for peer-to-peer energy trading without a central authority.

Mermaid Diagram:

graph TD
    A[Manufacturing] --> B{Create Digital Passport};
    B -- Hash & Sign --> C[Blockchain];
    C -- Immutable Record --> D[Passport: S/N, BOM, QA];

    E[Field Operation] --> F{Measure kWh};
    F -- Sign with Private Key --> G[Blockchain];
    G -- Immutable Record --> H[Energy Ledger: Joint_ID, kWh, Timestamp];

    I[Auditor/Energy Trader] --> C;
    I --> G;

    style C fill:#d6a,stroke:#333
    style G fill:#d6a,stroke:#333

2.2. The "Inverse" or Failure Mode

Derivative 2.2.1: Fusible-Link Overmold for Safe Disconnection

Enabling Description: The single drop-line joint is designed for graceful failure in an over-temperature or over-current event. The compression lug connecting the drop line to the feeder cable is made of a low-melting-point solder alloy (e.g., a Bismuth-Tin alloy melting at 138°C). This lug is mechanically held in compression by the rigid undermold. The overmold, however, is made from a polymer with a pre-designed thermal failure point. If the junction overheats, the overmold softens and deforms, allowing the undermold to shift. This releases the mechanical compression on the solder lug, which then melts and flows, cleanly breaking the electrical circuit of the drop line. The feeder cable remains intact and continues to power other drops. This provides localized, non-resettable fusing directly at the tap, preventing a fault from propagating.

Mermaid Diagram:

stateDiagram-v2
    [*] --> Normal
    Normal: Lug is solid, Overmold is rigid
    Normal --> Overheat : Temperature > 140°C
    Overheat: Overmold softens, Undermold shifts
    Overheat --> Disconnected : Solder Lug Melts
    Disconnected: Drop line circuit is open
    Disconnected --> [*]

Derivative 2.2.2: Current-Limiting "Limp Mode" Joint

Enabling Description: The connection between the drop line and feeder cable is made via a Positive Temperature Coefficient (PTC) resettable fuse, which is embedded within the undermold. Under normal operating conditions (e.g., < 30A), the PTC has very low resistance. If a downstream fault causes the current to exceed the rated threshold, the PTC rapidly heats up and its resistance increases by several orders of magnitude, effectively "throttling" the current to a very low, safe level without completely opening the circuit. When the fault is cleared and the PTC cools, it automatically resets to its low-resistance state. The overmold is designed with external cooling fins to help dissipate heat from the PTC during a fault event, allowing it to remain in its high-resistance state until the fault is resolved. This enables a "limp mode" for a section of a solar array, rather than a complete shutdown.

Mermaid Diagram:

graph LR
    subgraph OvermoldWithFins
        Feeder_In --- PTC[PTC Resettable Fuse] --- Feeder_Out;
        Drop_Line --- PTC;
    end
    subgraph "Normal Operation (I < 30A)"
        PTC_Normal((Low Resistance))
    end
    subgraph "Fault Condition (I > 30A)"
        PTC_Fault((High Resistance))
    end

    PTC_Normal -- Overcurrent --> PTC_Fault;
    PTC_Fault -- Fault Cleared & Cooldown --> PTC_Normal;

Part 3: Combination with Open-Source Standards

Scenario 3.1: Integration with Controller Area Network (CAN) Bus (ISO 11898)

Enabling Description: The lead assembly is combined with the open CAN bus standard, widely used in automotive and industrial automation. A twisted pair for CAN communication is co-extruded with the feeder cable conductors or run alongside it. Each overmolded joint (as described in 1.3.1 or 2.1.1) incorporates a standard CAN transceiver chip (e.g., MCP2551). The joint broadcasts standard CAN frames containing its unique ID, real-time current, voltage, and temperature data onto the bus. This allows any ISO 11898 compliant device, such as an open-source data logger (e.g., an Arduino with a CAN shield) or a sophisticated SCADA system, to monitor the health and performance of the entire solar array string in a standardized, interoperable manner.

Scenario 3.2: Integration with Power over Ethernet (PoE - IEEE 802.3bt)

Enabling Description: The system is adapted for applications requiring both power and high-speed data. The feeder cable is replaced with a hybrid cable containing both heavy gauge DC conductors and four twisted pairs of Cat6A Ethernet cable. The overmolded joint separates these components. The DC conductors are tapped as described in the patent. The Ethernet pairs pass through the joint to a standard, ruggedized RJ45 connector integrated into the overmold. This RJ45 port provides a connection point compliant with the IEEE 802.3bt (Type 4) PoE standard, capable of delivering up to 90W of power and 10 Gigabit Ethernet. This allows a single drop to power and connect high-bandwidth devices like security cameras, wireless access points, or industrial IoT gateways.

Scenario 3.3: Integration with Open-Source Wireless Protocols (LoRaWAN)

Enabling Description: The lead assembly incorporates IoT capabilities (as described in 2.1.1) but uses the fully open LoRaWAN communication protocol. Each joint contains a microcontroller and a LoRa radio module. It registers itself with a LoRaWAN network server (e.g., The Things Network, an open and global community network) using a standard Over-the-Air Activation (OTAA) procedure. The joint then transmits its sensor data payload using the open LoRaWAN data format. This allows a user to deploy a vast network of these monitoring joints and receive the data using any standard LoRaWAN gateway, free from proprietary communication protocols or vendor lock-in. This enables community-driven or crowdfunded monitoring of large-scale renewable energy projects.